<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 标签选项卡 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_name">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catList"
                :props="cascaderProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="item2"
                  v-for="(item2, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的后台api地址 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" style="margin-top: 15px" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisiable" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>


<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      //添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        // 商品的内容
        goods_introduce: '',
        attrs: [],
      },
      //添加商品表单的验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入内容', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入内容', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入内容', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入内容', trigger: 'blur' },
        ],
        goods_cat: [{ required: true, message: '请选择分类', trigger: 'blur' }],
      },
      //获取到的商品分类列表
      catList: [],
      //级联选择器的属性对象
      cascaderProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
      },
      //商品的动态参数列表
      manyTableData: [],
      //商品的静态属性列表
      onlyTableData: [],
      //上传图片的url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      previewPath: '',
      //预览对话框的显示与隐藏

      previewVisiable: false,
    }
  },
  created() {
    this.getCatList()
  },
  methods: {
    //获取商品分类列表
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status != 200) return this.$message.error('获取商品分类失败')
      this.$message.success('获取商品分类列表成功')
      this.catList = res.data
    },
    // 监听级联选择器选择的变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //监听标签页切换的 钩子函数
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName == '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.info('请先选择商品分类')
        return false
      }
    },
    //点击标签触发函数
    async tabClicked() {
      if (this.activeIndex == '1') {
        // 证明访问的是动态参数面板
        const { data: res } = await this.$http.get(
          `categories/${this.catId}/attributes`,
          {
            params: {
              sel: 'many',
            },
          }
        )
        if (res.meta.status != 200)
          return this.$message.error('获取动态参数失败')
        this.$message.success('获取动态参数成功！')
        res.data.forEach((element) => {
          element.attr_vals =
            element.attr_vals.length == 0 ? [] : element.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex == '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.catId}/attributes`,
          {
            params: {
              sel: 'only',
            },
          }
        )
        if (res.meta.status != 200)
          return this.$message.error('获取静态属性失败')
        this.$message.success('获取静态属性成功！')
        this.onlyTableData = res.data
      }
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },

    //处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisiable = true
    },
    //处理移除图片的操作
    handleRemove(file) {
      const filePath = file.response.data.temp_path
      const i = this.addForm.pics.findIndex((x) => {
        x.pic == filePath
        this.addForm.pics.split(i, 1)
      })
    },
    //添加商品
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写完整必要的信息')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        //  处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        console.log(this.addForm)
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status != 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    catId() {
      if (this.addForm.goods_cat.length != 3) return null
      return this.addForm.goods_cat[2]
    },
  },
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
</style>